Prohibits specified practices by insurers and pharmacy benefit managers in reimbursing cost of prescription drugs. May not discriminate against a 340B pharmacy in a manner that prevents or interferes with an enrollee’s choice to receive drugs from the pharmacy by reimbursing a 340B pharmacy less than any other network pharmacy or imposing a fee, charge-back or other adjustment on a claim for reimbursement based on a pharmacy’s status as a 340B pharmacy.